Thomas goodenough



(No Model.)

T. GOODENOUGH.

DOOR CHECK.

No. 432,485. PatentedJuly 15, 1890.

WITNESSES INVENTOR ATTORNEYS.

UNITED STATES PATENT OFFICE.

THOMAS GOODENOUGH, OF

IVOODSIDE, ASSIGNOR TO VILLIAM P. YVARD, OF NEW YORK, N. Y.

DOOR-CHECK.

SPECIFICATION forming part of Letters Patent No. 432,485, dated July 15, 1890.

Application filed September 5, 1889- Serial K111323081. (No model.)

To all whom it may concern:

Be it known that I, THOMAS GOODENOUGH, of \Voodside, in the county of Queens and State of New York. have invented a certain new and useful Improvement in Door-Checks,

of which the following is a specification.

This invention relates to that class of doorche'cks known as pneumatic door-checks, and it consists in the construction and novel arrangement of parts, as hereinafter set forth.

The object is to provide a door-check which is simple and cheap in its construction and to so connect the piston-rod to the operatinglever that a door to which the check is atr 5 tached may be swung back against the wall.

In the drawings, Figure 1 is a top View showing the position of the parts when the door is closed. Fig. 2 shows the position of the parts when the door is open, and Fig. 3 is a front view with a portion of the cylinder broken away.

Similar letters indicate like parts in all the figures of the drawings.

Referring by letter to the drawings, A des ignates a cylinder having the head a, from which extend arms a a provided with holes for the passage of screws to attach the device to a door-casing. A piston l3 is arranged within the cylinder and provided with a rod Z), extending through an opening in one of the cylinder-heads. A spring b is coiled around the piston-rod in the rear of the piston, and .a valve 1) is seated in one head of the cylinder, by which the escape of compressed air may be regulated.

As the above parts are of the ordinary construction and operate in the usual manner,

further description thereof is not deemed nec essary.

O designates the operating-lever pivotally connected to the arm a I have here shown the arm a as slotted and the end of the operating-lever pivoted therein.

The lever O is substantially S-shaped, and has a long curved bearing-surface c. The 5 lever has a swinging or sliding connection with the piston -rod 1), consisting, as here shown, of a link D,'pivoted at one end to the piston-rod,extendingforwardlytherefrom and embracing each side of the lever O, and hav' 5o ing a roller-bearing d within the outer end bearing upon the surface 0 of the lever C.

The lever O is pivotally connected at its outer end to one end of a link 0', which is pivoted at its other end to the bracket 0 secured to the door.

By connecting the lever C to the piston-rod b means of a swin in connection instead of the rigid connection usually employed, I am enabled to swing a door farther open, as the links being pivoted may be drawn out of line of the piston-rod, as shown in Fig. 2.

Having described my invention, what I claim is- In a door-check, the combination, with the cylinder, the piston, the piston-rod, and the curved actuating-lever, of the link pivoted at one end to the piston-rod and havinga bearing against a curved surface of the actuating-lever, substantially as specified.

THOMAS GOODENOUGH.

Vitnesses:

O. R. FERGUSON, WM. M. ILIFF. 

